Announcement
Patch notes for Dec 28
Fixed display of negative numbers in Sandbox Mode Fixed focus restoration after hitting the Escape key Manual memory watches now persist across runs Updated stats
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SIC-1
Also known as SIC-1, s1, sic 1
SIC-1 is a single-instruction programming game. Neglect your personal life in pursuit of promotions and vague assurances of job security! Optimize your programs to rise to the top of the leaderboards! SIC Systems thanks you for your hard work! Now please return to your desk.
Last update
30 May 2026
Players now
2
Latest update
Update history
Browse past updates and patch notes for this game.
14 updates
August 2023
- Patch notes for Aug 12Fixed display of inline variables Revised testing and errata sections of manual Clarified puzzle descriptions Updated charts
July 2023
- Patch notes for July 25v1.10.0: Added native Linux build Added cross-platform Steam Cloud sync Updated charts
March 2023
- Patch notes for Mar 25v1.9.10: Updated charts
February 2023
- Patch notes for Feb 21v1.9.9 is a hotfix update: Fix handling of whitespace when editing Sandbox Mode input.
- Patch notes for Feb 19v1.9.8 is focused on helping new players: Added Help button/menu Added hints Added support for inline label definitions ("subleq 0, @b: 1") Fixed text editing immediately after clicking "Continue Editing" Fixed achievem…
- Patch notes for Feb 9v1.9.5 improves the code editor and adds new music: Added one new music track Added block comment/uncomment Added block indent/unindent Added auto-indenting Added optional support for inserting tabs Added in-code/persis…
- Patch notes for Feb 2v1.9.2 is a hotfix release to address a severe bug in solution management: Fix deletion of currently-open solution
January 2023
- Patch Notes for Jan 29Added a new final puzzle Turbo button to speed up simulation Auto-select offending line on compilation error Fix solution slots for unsolved puzzles Click to toggle watch for arbitrary memory cells Filter (high) outlier…
- Patch notes for Jan 19Multiple save slots for solutions Breakpoints Graphical improvements Updated charts More detailed chart tooltips
- Patch notes for Jan 11Sandbox Mode (an open-ended task with customizable input, for experimentation/exploration) Alternative color schemes (black-on-white, white-on-gray, amber phosphor, and a more accurate P1 green phosphor) In-manual ASCII…
December 2022
- Patch notes for Dec 29Simplified the first two nontrivial puzzles Added a separate, printable HTML manual Added tooltips to charts Added support for negated labels Added support for number-only label names (e.g. "@1") Updated charts
Gallery
In-game media
Achievements
Community progression
Top picks from 14 Steam achievements, sorted by player unlock rates.
- EngineerGet promoted to Engineer.36.5%
- Workin' HardComplete a task after 9pm (21:00) local time.28.4%
- Up and at 'EmComplete a task before 6am (06:00) local time.19.6%
- Engineer IIGet promoted to Engineer II.12.8%
- Senior EngineerGet promoted to Senior Engineer.11.6%
- Zero Instruction ComputerSolve "Addition" without typing "subleq".9.7%